Laurent Aubert Sun, 06/07/2009 - 09:26
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ISR (1800/2800/3800) have a build-in encryption acceleration card but require Cisco IOS Software Advanced Security or higher feature set to enable it

If you want the best performance for those boxes, AIM-VPN modules are recommended:



tech_trac Sun, 06/07/2009 - 10:00
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Could you please also mention the difference between the performance on built-in encryption acceleration card and the AIM-VPN Modules for e.g. in case of 2821 routers.

Are the VPN modules visible from outside the router after installation or are they seated inside the router.


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